docs: add example for gost plugin

docs/config.yaml

@@ -449,6 +449,26 @@ proxies: # socks5
       password: "shadow_tls_password"
       version: 2 # support 1/2/3
 
+  - name: "ss5"
+    type: ss
+    server: server
+    port: 443
+    cipher: chacha20-ietf-poly1305
+    password: "password"
+    plugin: gost-plugin
+    plugin-opts:
+      mode: websocket
+      # tls: true # wss
+      # 可使用 openssl x509 -noout -fingerprint -sha256 -inform pem -in yourcert.pem 获取
+      # 配置指纹将实现 SSL Pining 效果
+      # fingerprint: xxxx
+      # skip-cert-verify: true
+      # host: bing.com
+      # path: "/"
+      # mux: true
+      # headers:
+      #   custom: value
+
   - name: "ss-restls-tls13"
     type: ss
     server: [YOUR_SERVER_IP]